If you don't have the extensions showing, you can access the extensions by clicking on the puzzle piece where the right-most arrow is pointing to. Otherwise, you can click on the ad blocker program icon (where the left-most arrow is pointing at).Add-on, Chrome... but I see no reference to the ad blocker prog anywhere.
I tried all the standard places to shut it off. And then I couldn't find the prog to un-install it. Help!